Electric heater.



A. A. WARNER.

ELECTRIC HEATER.

APPLICATION FILED AUG.7.1913.

1,1 20,003. Pa tented Dec. 8, 1914.

I '/7.\'/; 318/118; 0 4 i if? M i Alonzo A. Warner.- ,Z H /M UNITEDSTATES PATENT OFFICE.

ALONZO A. WAIBNEB, OF NEW BRITAIN, CONNECTICUT, ASSIGNOR T0 LANDERS,FBARY G. CLARK, OF NEW BRITAIN, CONNECTICUT, A CORPORATION OFCONNECTICUT.

ELECTRIC HEATER.

Specification of Letters Patent.

Patented Dec. 8, 1914.

Application filed August 7, 1918. Serial No. 783,489.

'1 '0 all whom it may concern:

Be it known that I, ALONZO A. WARNER, a citizen of the United States,and a resident of New Britain, in the county of Hartford and State ofConnecticut, have invented certain new and useful Improvements inElectric Heaters, of which the following is a specification.

The object of this invention is to produce a device of the characterdescribed having features of'novelty and advantage.

In the drawings, Figure 1 is a front view of a device made in accordancewith my invention. Fig. 2 is a sectional side elevation thereof; 7

Referring to the drawings, a denotes th standard which may be of anydesired or convenient shape. he heater comprises a double-walledreflector b of concavo-convex form inclosing a dead-air insulatingspace; the rear wall 0 of the body is fastened to a central supportingmember cl having a recessed lug e, to fit on the standard a. The innerwall f of the body is positioned against the front of the support d andagainst it is located a plate 9 which is secured to the support d in anyconvenient manner as by screws which pass through the inner wall f ofthe body to securely position these parts. Arms h which are secured tothe plate g have attached to their outer ends a holder 1' which is ofelectrical insulating material or is lined with insulating material. Asshown this holder has two concentric grooves 2, 3, the dividing wall of.which is notched as at 4. An electrical resistance unit preferably inthe form of a closely coiled compound helix is wound into theinnergroove 3, and then stretched around the ends of the notch 4 andreversely wound in the outer groove 2, the termina s 5, 6, of the fool]being carried through insulating bushings 7, 8, and connected with theplugs 9 which project from the rear of the socket 10 which is secured tothe front of the plate 9 as by the screws 11. -By utilizing a closelywound compound helix, which constitutes a pliable self-su portingstructure, it is possible to provige a very large amount of resistancematerial within a very small compass, and to install the unit in variousand irregular shapes to meet the necessities of any given case.Substantially all the surface of the resistance wire is open to contactwith the air, producing a structure in which the heating effect has thegreatest possible efliciency, with the result that the device as awhole, though in a small and readily portable form, is capable ofreadily heating large volumes of air, making it particularly useful forthe heating of rooms. A guard is provided for the exposed parts of theunit in the form of a ring 12, which is fastened to the holder and hascurved fingers 13 projecting from the face of the holder. The socket 10is provided to receive a light bulb 15, but if desired this can beomitted and the terminals 5, G,carried directly to the plugs 9. Thesupport is transversely apertured in order that a connection piece runfrom an ordinary lamp socket may be engaged with the plugs 9.

It will be understood that the structure is susceptible of variousmodifications which come within the invention as set out in the appendedclaims, and that the shape and urrangemcnt of the several parts hereillustrated and described may be varied without departing from thespirit of the invention.

I claim as my invention:

1. In a portable device of the character described, a standard, areflector mounted thereon, an insulating holder supported by saidstandard within the reflector and spaced therefrom, an electricalresistance unit mounted in the holder, and electrical connectionstherefor.

2. In a portable device of the character described, a standard, aconcavo-convex reflector mounted on the standard, an annular holdersupported by the standard and located within the reflector and spacedtherefrom, an electrical resistance unit located on the front of theholder, and electrical connections therefor.

3. In a device of the character described, a standard, a su )portsecured thereto, a concavo-convex reflector secured to said support andhaving double walls inclosing an air space, outwardly branching armscarried by said support, an annular holder secured to the ends of saidarms within said reflector and spaced therefrom, said holder beinggrooved in its front wall. an electrical resistance unit mounted in saidgroove. and electrical connections therefor.

4. In a device of the character described. a standard, a concavo-convexreflector, an

annular holder supported within said reflector just back of the plane ofthe front edge thereof. and spaced from the reflector, a plurality ofconcentric grooves in the front face of the holder, the dividing wallbetween said grooves being notched, a continuous pliable resistance unitlocated in said grooves and stretched over the ends oi said notch, andelectrical connections f0 said unit.

5. In a device of the character described, a standard, a support securedthereto centrally a ertured, a concavo-convex reflector provide withdouble walls located against the front and back of said support,'a platelocated inside said reflector and secured to said support, outwardlybranching arms on said plate, a holder secured to the ends of said armswithin said reflector and spaced therefrom, a socket secured to saidplate, terminal plugs projecting from the rear of said socket throughthe aperture in the support, an electrical resistance unit located onsaid holder, and electrical connections between said unit, socket andplugs.

6. In a device of the character described,

a standard, a concavo-convex reflector mounted thereon, a holder suported within the reflector and spaced there rom, an elec-- tricalresistanceunit in the form of a pliable compound helix mounted on saidholder, and electrical connections for said unit.

7. In a device of the charaeten described, a standard, a support mountedthereon, a reflector comprising a concavo-convex rear wall secured atits center to the back of said support, and a concavo-convex front wallsecured at its center to the front of said support, said walls bein incontact along their front edges and inc osing an air space, a holderlocated within the reflector, and an electrical resistance unit mountedon the front of the holder.

8. In a device of the character described, a standard, a concavo -convexreflector mounted thereon, a lam socket located centrally within the reector, an annular holder located within the reflector and spacedtherefrom, an electrical resistance unit mounted in the front of theholder,

contact plugs projecting from the rear of said socket, and an electricalcircuit including said unit, socket and phi?- ALONZO A. ARNER.Witnesses:

C. A. LAI'PAN, HENRY FAGAN.

